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  9. Q2217

RRB Junior Engineer / DMS / CMA 2019 · Question 2217 of 3719

A sample of soil is mixed with water and allowed to settle. The clear supernatant solution turns the pH paper yellowish-orange. Which of the following would change the colour of this pH paper to greenish-blue?

  1. AAn antacidCorrect
  2. BCommon salt
  3. CLemon juice
  4. DVinegar

Answer: A. An antacid

Official answer key verified. Detailed explanation coming soon.

Source: RRB JE 2019 CBT-1 (28-May-2019 Shift 2) — cracku.in solved paper with answer key · reliable-secondary

← Q2216View full paper (3719 questions)Q2218 →

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